Catcher sub

Details Catcher sub Catcher sub

1992-06-08

1993-09-14

Britts, Ramon S.

Wells

Valves, closures or changeable restrictors

Longitudinally movable operator

166238, 166242, E21B 3410

Patent

active

052440443

ABSTRACT:
An improved catcher sub has a longitudinal flow passage and a collet slidably mounted around the flow passage in the sub housing. The collet has a number of fingers and each finger has a resilient seal segment. The collet is held and supported in up fingers contracted position where the resilient seal segments seal on each other forming an annular seal ring smaller than the longitudinal flow passage. When high pressure is applied on a ball sealingly engaging the annular seal ring, the collet is supported in the up contracted position while the pressure moves an annular piston to a position which permits the collet to be moved to a lower expanded position larger than the longitudinal flow passage by a later application of lower pressure on the ball and the ball to be expended downwardly through the collet and sub flow passage.

REFERENCES:
patent: 4345649 (1982-08-01), Baugh et al.
patent: 4708208 (1987-11-01), Halbardier
patent: 4828037 (1989-05-01), Lindsey et al.
patent: 4862966 (1989-09-01), Lindsey et al.
patent: 4893678 (1990-01-01), Stokley et al.
patent: 5020600 (1991-06-01), Coronado
patent: 5044444 (1991-09-01), Coronado
patent: 5069280 (1991-12-01), McKee et al.
patent: 5181569 (1993-01-01), McCoy et al.
Otis Engineering Corporation, Products and Services catalog, OEC 5516, p. 61 Copyrighted 1989 by Otis Engineering Corporation.

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